泡生法蓝宝石晶体生长工艺的探讨

刘丽君¹, 徐家庆², 蔡兴民¹

1.深圳大学物理科学与技术学院;2.深圳晶蓝德灯饰有限公司



摘要:

为了研究工艺参数对泡生法蓝宝石晶体生长过程及其晶体质量的影响,在自行研制的泡生法蓝宝石晶体生长炉上进行了试验.调整籽晶热交换器水流量及进水温度,并在等径生长期间采用不同的维持功率下降速度,结果表明:热交换器冷却强度对引晶及放肩阶段晶体生长有显著影响,并逐步减弱;维持功率下降速度直接影响等径生长阶段的晶体生长速度和晶体质量,下降太快将导致晶体缺陷密度增加,严重时形成多晶.在晶体生长过程中,合理调节籽晶热交换器的冷却强度,谨慎操控维持功率下降速度是蓝宝石单晶生长成败的关键.

关键词:  泡生法  蓝宝石单晶  水冷热交换器  维持功率

DOI：10.11918/j.issn.0367-6234.2011.03.030

分类号:O782

基金项目:



Research on the sapphire mono-crystal growth technique by kyropoulos method

LIU Li-jun¹, XU Jia-qing², CAI Xing-min¹

1.College of Physics and technology,Shenzhen University,518060 Shenzhen,China;2.Shenzhen Kingland Lighting Co.Ltd.,518108 Shenzhen,China)

Abstract:

For studying the effects of technological parameters on sapphire crystal growth and quality of the sapphire,several modifications of technological parameters were made on self-developed Kyropoulos furnace during crystallization,including the adjustment of flow rate and temperature of cooling water in thermal exchanger,and the descending rate of maintain power.It was found that the cooling intensity of thermal exchanger influences the crystal growth obviously in the stage of seeding and shoulder-expanding and the influence weakens gradually,while the descending rate of maintain power during the stage of iso-diametric growth has a great effect on the crystallization rate and the quality of the sapphire.Too fast decreasing of maintain power will cause the failure of mono-crystal growth,so that the proper adjustment of cooling intensity of thermal exchanger and the careful control of maintain power during crystal growth are the two important factors for successfully producing sapphire mono-crystal.

Key words:  Kyropoulos method  sapphire mono-crystal  water cooled thermal exchanger  maintain power